U. S. DEPARTMENT OF AGRICULTURE 
BUREAU OF BIOLOGICAL SURVEY 
Form Bi-689 
(Official title.) 
Period, 
This book is Government property. The finder 
is requested to mail it to the Bureau op Bio¬ 
logical Survey, Department of Agriculture, 
Washington, D. C., or deliver it to the official 
whose name appears above. A detachable addressed 
frank will be found on the last page; by tying this 
on the cover the book may be mailed without post¬ 
age or wrapping if fastened shut. 
-N'T 1’KL-iTINU OFJCK 
